An irrigation system is a series of pipes that carry water from a source, such as a well or reservoir, to sprinkler heads in your yard. The sprinkler heads distribute the water over your lawn or garden. Watering systems can be either automatic or manual and use a variety of methods for distributing water over your plants. Automatic irrigation systems use timers or moisture sensors to detect when plants need watering and turn on the appropriate sprinklers at the appropriate times. Manual systems require you to manually turn them on when needed;... read full review »